The world's first zoo for microbes collecting the horrible and wonderful things living on and around us.

This 12th-century castle majestically overlooks the city and the beautiful Mosel River valley.

An eerie ghost village hidden in the forests of the Eifel, frozen in a strange postwar limbo.

The defense built to protect one of the last found pieces of land on Earth.

This 19th-century fountain features sculptures of little gnomes that help with chores.

This little jewel of post-war religious architecture is hidden inside the Diocesan Museum, which swallowed it when it was built.

Elevated freight railway turned wildly successful urban park.

"We Seceded Where Others Failed."

This French anatomy museum greets guests with a skinless man, mid-shovel.

The ancient heart of Tunis is an enormous maze of narrow streets and alleyways.

In this truly magical place, rent hasn't been raised since the year 1520.

This "floating railway" is one of the world's oldest monorail systems.

The world's only silo that was topped by two revolving restaurants has unfortunately been demolished.

Fantastic views and thousands of love locks.

Hitler's bleak vision of relaxation still stands as a mostly abandoned 10,000-room resort complex.

This former Nazi castle was built as a school to train what would have been the future of the Third Reich.

Nordic giants resurrected from the sea and restored to their former greatness.

This Denmark theme park is part family attraction, part experimental archaeology project.

This black sand beach was crafted from volcanic explosions including the historic Minoan eruption.

A giant scale model giving a sneak peek at what urban planners see for Shanghai by 2020.

On the highest peak in the Harz Mountains, science and the occult faced off in a failed attempt to turn a goat into a boy.

This futuristic German television spire is actually the world's largest digital clock.

The largest bell in the world has been swinging high above a Cologne cathedral for almost a century.

This unique rock formation is quite the local celebrity, although one day it may come crashing down.